EDITORIALBOARD. Index of volume 59 of „Ukrainian Mathematical Journal”. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 59, n. 12, p. 1725–1729, 2007. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3428. Acesso em: 6 dec. 2025.